After Archive and Install, MBPro is SLOW

[stanthecaddy]

So it all started while I was watching a movie. The movie started skipping and eventually the Mac froze. I forced a restart, and when the mac booted back up, it came to a grey screen and froze there. On the forum I read to archive and install, and the first time I tried, the install froze and after that I tried to restart again, and then it said that the incorrect version was trying to be installed. I then used a different disk, and archive and installed from there. It worked, but only used one of the disks. Now, my macbook is excruciatingly slow. It literally took 30 minutes to type this paragraph. I really have no idea what to do now. Now Mac OS X is at version 10.5.2, I have a 2.4 GHz Intel Core 2 Duo, 2GB of 667 MHz DDR2 SDRAM. I can't move anything from the Previous Systems folder onto my Hard drive without the Finder restarting and forcing me to restart. Any help would be soo greatly appreciated.